It's kinda hard to explain since the anime used a rather different sequence with the LN. Like the order of things happened were not the same. There are also TONS of differences between the anime and LN. But roughly 3 volumes are covered. Maybe Sora can explain better.

Began reading the first part of volume 2 and recognized pretty much everything so 3 volumes covered sounds accurate. But I might as well read volume 1-3 (sounds necessary if the plot differs so much) while waiting for the translations to finish.Anyways thanks for the answer